The developer behind the HildaCrypt Ransomware has decided to release the private decryption keys. With these keys a decryptor can be made that would allow any potential victims to recover their files for free. BleepingComputer had a conversation with the ransomware developer last night and was told that Hildacrypt was only made for fun and “it was mainly an educational thing really”” The developer intimated that they were probably going to stop development of the ransomware and instead focus on getting involved in more legitimate efforts of the cybersecurity community.”
Source: https://www.bleepingcomputer.com/news/security/hildacrypt-ransomware-developer-releases-decryption-keys/